21231600403 has 16 divisors (see below), whose sum is σ = 24250072896. Its totient is φ = 18438963840.

The previous prime is 21231600391. The next prime is 21231600421. The reversal of 21231600403 is 30400613212.

It is not a de Polignac number, because 21231600403 - 2¹³ = 21231592211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21231601403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563800 + ... + 600277.

It is an arithmetic number, because the mean of its divisors is an integer number (1515629556).

Almost surely, 2^21231600403 is an apocalyptic number.

21231600403 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21231600403 is a deficient number, since it is larger than the sum of its proper divisors (3018472493).

21231600403 is a wasteful number, since it uses less digits than its factorization.

21231600403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164174.

The product of its (nonzero) digits is 864, while the sum is 22.

The spelling of 21231600403 in words is "twenty-one billion, two hundred thirty-one million, six hundred thousand, four hundred three".